... unplasticized poly（vinyl chloride）未增塑聚氯乙烯 unplasticized PVC未增塑聚氯乙烯 unreactive hydrocarbons惰性烃；惰性碳氢化合物 ...
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unplasticized PVC film 未增塑聚氯乙稀薄膜
unplasticized PVC sheet 未增塑聚氯乙稀片材
unplasticized PVC compound 未增塑聚氯乙稀混合料
Plastics piping systems for buried and above-ground drainage and sewerage under pressure - Unplasticized poly (vinyl chloride) (PVC-U) - Part 1: specifications for piping components and the system.
地下和地上排水和排污用塑料压力管道系统。未增塑聚氯乙烯(PVC - U)。第1部分：管道件和系统规范。
The cause of color-changing of unplasticized polyvinyl chloride(PVC-U) profile in the process of window-making and storage and its prevention are presented.
介绍硬质聚氯乙烯（ PVC U）异型材在储存、成窗的过程中产生变色的原因及其预防措施；
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